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1'. P. SNEDDON.

WATER TUBE BOILER.

APPLICATION FILED DEC, I0, I915.

:IaIenIvd XIWI 11. 1919 iTS- SHEEI I.

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IN V EN TOR.

w m m W UNITED STATES PATEN Lumen summon, or BAYONNE, new JEasnY,nssrenora'ro 'IIQE Bassoon a witcox commny, on nayom. NEWJERSEY, Acoaroaa'rron or new JERSEY.

WATER-TUBE BOILER.

4pplication filed December 10, 1915. Serial No. 66,031.

To all whom it may concern:

Be it known that I, JAMEs'R Summon,

a citizen of the United States, residing at Bayonne, in the county ofHudson and State of New Jersey, have invented 'a new and usefulImprovement in Water-Tube Boilers,

of which the following is a full, clear, and exact description,reference being had 'to the accompanying drawings, forming part of.

this specification, in which Figure 1 is a sectional side elevation ofone form of boiler constructed in accordance with my invention; Fig. 2 adetail showing the auxiliary drum support of Fig. 1; Fig. 3 a viewsimilar to Fig. 1 showing another form of the invention; Fig. '4 adetail view showing the auxiliary drum mounting of Fig. 3; and Figs.5and 6 par tial cross sections showing slight modifications. Similarreference numerals indicate similar parts in the several views.

My invention relates to the general type of Stirling boilers, whereinupper transverse steam and Water drums are connected by banks of tubesto a lower mud drum or drums, the gases being directed by bathing .inserial passes over the banks.

provision is made to allow the foam to separate out from the-steam, itwill be carried over with the steam, giving what is known as a primingaction.

Referring to Figs. 1 and 2, the, numerals 2, 3 and 4 represent thefront, middle and rear transverse steam and water drums of a Stirlingboiler. These drums are connected by banks of tubes 5, 6 and 7 with atrans verse mud drum 8. Bafiling shown at 9, 10 and ll 'is arranged todirect the gases rising from the furnace 12" in serial passes over thebanks to the ofi'take 13. 14: designates water circulators connectingthe water spaces of the drums 2 and 3. The drums 3 and 4' are alsopreferabl con nected by water circulators 17, bot sets of watercirculators supporting tiling, as shown.

The steam in the front drum 2 is taken Specification of Letters Patent.

Patented Nov. if, 1919.

through the steam circulators 33 to the middle drum 3, and from thelatter to the rear drum L -through steam circulators 342. From,

the rear drum the steam passes through pipes 35 into a supplementalsteam drumlfi which is preferably mounted above and para allel with themiddle drum 3*. a The supplemental drum is cut off from the steam spaceof the middle drum 3 by plates 32, bolted, as shown in Fig. 2.

In this form of my invention the steam V generated in the front drum,which contains a certain amount of foam, will pass over through thepipes 33 into the middle drum 3, which serves as a settling chamber.From the drum 3 the steam, from which most of the moisture has beeneliminated, passes over into the rear drum 4? and thence into'thesupplemental drum 19 in which the steam is completely separated from anyfoam or priming water and passes out as dry steam through theperforations in the dry plate 20 The dry plate not only assists inseparating the foamfrom the steam but also serves to minimize the effectof any sudden demand of steam from the bbiler which would cause a suddencorresponding reduction of pressure'in the boiler tending to aggravatethe priming action. The water collecting in the dry plate flows throughpipe 30 to the bottom of the drum 19 and is led off therefrom throughthe pipe 36 to the mud drum 8. y

In Fig. 3 I show another arrangement with a boiler substantially thesame as that shown in Fig. 1, the same parts being iudicated by. thesame reference numbers with the exponent b applied thereto. In this formI use a dry plate 20 similar to the dry plate 20 of Fig. 1. Instead,however, of draining the water from the supplemental. drum to the muddrum, I lead such water through pipe 3'2 directly into the water spaceof the middle steam and water" drum As shown-in Fig. 4; a perforatedplate 32 across the openiim in the drum l9. permits the ater to collectin the nipple connection be ween said drum and .the drum 3* a steamcirculators 85 and the dry plate 20*.

Instead of leading the dry steam direct from the supplemental drum 19*,as in Fig.

1, it maybe led through the main 21 to a superheater '2 located, asshown, in the second pass of the boiler.

In Figs. 5 and 6 I have shown a dry pipe 3l -instead' of the dry plate20 of Fig. 3. In Fig. 5 the water collecting in the-supplemental drum isdrawn off through the pipe 36 and discharged into the mud drum 8 asshown in Fig. 1. In Fig. 6 the water collecting in the supplemental drumis discharged througl. the pipe 37 into the middle steam and water drumas in Fig.

The supplemental drum is preferably supported on the intermediate steamand water drum, which, in turn, is supported with the boiler on thestructural work of the setting. The advantage of my invention resultsfrom the use of this supplemental drum in a boiler of the typeillustrated, such use greatly reducing or preventing priming.

As described, the drain pipe from the supplemental drum leads to a pointbelow thewater level either in the mud drum or the middle steam andwater drum. This water seal prevents short circuiting of the steam backthrough the drain pipe. Should the lower end of the drain pipe not besealed. steam would flow back through it into the supplemental drum andthus prevent the fiow of water from the supplen'iental drum and preventproper draining of the latter.

\Vhat I claim and desire to secure. by Letters Patent of the UnitedStates is:

1. A steani boiler having three upper transverse drums connected bybanks of tubes to a mud drum or drums, steam circulators connecting themiddle and rear upper drums andarrangcd to conduct the steam to the reardrum, an independent supplemen tal drum and continuously openconnections to lead the steam thereto from the rear drum, a steam dryingdevice in the out let of said supplemental drum, and a continuously opendrain pipe from said supplemental drum leading to a point below thewater level in the boiler.

A steam boiler having three upper transverse drumsconnected by banks oftubes to a mud drum or drums, steam circulators connecting the middleand rear steam and water drums and arranged to conduct.

the steam to the rear drum, an independent supplemental drum andctmtinuously open connections to lead the steam thereto from the reardrum, a steam drying device in the outlet of said supplemental drum. anda continuously open drain pipe from said supplemental drum to a steamand water drum and discharging below the water level therein.

A steam boiler having three upper transverse drums connected by banks oftubes to a mud drum or drums, steam circulatof's connecting the middleand rear steam and water drums and arranged to conduct the steam to therear drum, an independent supplemental drum and continuously openconnections to lead the steam thereto from the rear drum, a steam outletfrom said supplemental drum, and a continuously open drain pipe fromsaid sulipleniental drum to a. steam and water drum, said drain pipedischarging below the water level in 'the drum.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

JAMES P. SNEDDON.

VVitnes-ses M. HJGREEXBERG, E. A. BANNON.

